Digital manufacturing engineering system(DMES) is the development and management system platform integrated design and manufacturing function based on the development of PDM system. The use of DMES system can assure product manufacturing process planning, process simulation and process feasibility assessment in the digital environment based on the product data, process data, plant data and resource data. The application scheme of process dummy evaluation in DMES aiming at SE process evaluation business activity was proposed in order to achieve effective support to business procedure.